Tutor doesn't configure Redis correctly

[bradenmacdonald]

Bug description

On my Tutor Main devstack, I often see errors like this:

tutor_main_dev-cms-1       | Traceback (most recent call last):
tutor_main_dev-cms-1       |   File "/openedx/venv/lib/python3.11/site-packages/edx_event_bus_redis/internal/producer.py", line 48, in record_producing_error
tutor_main_dev-cms-1       |     raise EventProductionException(error)
tutor_main_dev-cms-1       | edx_event_bus_redis.internal.producer.EventProductionException: Error -2 connecting to edx.devstack.redis:6379. Name or service not known.

This particular error occurred when importing a course.

How to reproduce

Import a course and look for event bus exceptions in the logs. It will not cause the import to fail.

Details

The problem is the EVENT_BUS_REDIS_CONNECTION_URL Django setting. In devstack.py it defaults to redis://:password@edx.devstack.redis:6379/. This URL is from the old devstack and is incorrect.

The correct setting seems to be EVENT_BUS_REDIS_CONNECTION_URL = 'redis://redis:6379/' and this needs to be set in both the LMS and CMS.

Environment

Open edX master
tutor, version 20.0.1-main

Additional context

n/a